Resultado da Busca
Há 3 dias · Amethyst is the purple variety of the quartz mineral species. It’s the gem that’s most commonly associated with the color purple, even though there are other purple gems such as sapphire and tanzanite. Its purple color can be cool and bluish, or a reddish purple that’s sometimes referred to as “raspberry.”. Most people think of ...
Há 2 dias · Photo by Eric Welch/GIA. Emerald is the green to bluish green variety of beryl, a mineral species that also includes aquamarine as well as beryls in other colors. Gem experts differ on the degree of green that makes one stone an emerald and another stone a less-expensive green beryl. Some people in the trade tend to give the name emerald to any ...
Há 4 dias · Submit your stones in person at one of our two convenient locations in Hong Kong or ship directly to our laboratory. Learn more about GIA’s laboratory services offered in Hong Kong. HISTORY OF GIA HONG KONG. GIA’s presence in Hong Kong began in the 1970s, with regular one-week extension classes.
Há 1 dia · And of all the 4Cs, it is the most complex and technically difficult to analyze. The GIA Cut Grading System for the standard round brilliant diamond evaluates seven components. The first three, brightness, fire, and scintillation, consider the diamond's overall face-up appearance. The remaining four, weight ratio, durability, polish, and ...
Há 23 horas · ダイヤモンドのカラット重量. ダイヤモンドのカラット重量とは、ダイヤモンドの重さの測定です。. 基準の「カラット」は200ミリグラムと定義されています。. 1カラットは100「ポイント」に分割することができます。. これにより、小数点以下百桁まで非常 ...
Há 3 dias · Alexandrite Description. This 7.19-carat alexandrite was cut to feature its beautiful color change. When the light source changes from daylight to incandescent light, the gem’s color changes from bluish green to reddish purple. Alexandrite, with its chameleon-like qualities, is a rare variety of the mineral chrysoberyl.
Há 5 dias · GIA は、独自の画期的な研究から開発され、業界をリードする専門家が提供するカリキュラムを使って、世界でも有 数の宝石とジュエリーの教育を提供しています。. GIA の教育では、宝石やジュエリーに対する情熱をやりがいのある仕事へと繋げるために ...
